Insurers need to adapt COSO/ISO Risk Management to achieve ERM

Posted July 29, 2014 by riskviews
Categories: Enterprise Risk Management, risk assessment, Risk Identification, Risk Management System

Tags: ,

Both the COSO and ISO risk management frameworks describe many excellent practices.  However, in practice, insurers need to make two major changes from the typical COSO/ISO risk management process to achieve real ERM.

  1. RISK MEASUREMENT – Both COSO and ISO emphasize what RISKVIEWS calls the Risk Impressions approach to risk measurement.  That means asking people what their impression is of the frequency and severity of each risk.  Sometimes they get real fancy and also ask for an impression of Risk Velocity.  RISKVIEWS sees two problems with this for insurers.  First, impressions of risk are notoriously inaccurate.  People are just not very good at making subjective judgments about risk.  Second, the frequency/severity pair idea does not actually represent reality.  The idea properly applies to very specific incidents, not to risks, which are broad classes of incidents.  Each possible incident that makes up the class that we call a risk has a different frequency severity pair.   There is no single pair that represents the class.  Insurers risks are in one major way different from the risks of non-financial firms.  Insurers almost always buy and sell the risks that make up 80% or more of their risk profile.  That means that to make those transactions they should be making an estimate of the expected value of ALL of those frequency and severity pairs.  No insurance company that expects to survive for more than a year would consider setting its prices based upon something as lacking in reality testing as a single frequency and severity pair.  So an insurer should apply the same discipline to measuring its risks as it does to setting its prices.  After all, risk is the business that it is in.
  2. HIERARCHICAL RISK FOCUS – Neither COSO nor ISO demand that the risk manager run to their board or senior management and proudly expect them to sit still while the risk manager expounds upon the 200 risks in their risk register.  But a highly depressingly large number of COSO/ISO shops do exactly that.  Then they wonder why they never get a second chance in front of top management and the board.  However, neither COSO nor ISO provide strong enough guidance regarding the Hierarchical principal that is one of the key ideas of real ERM.    COSO and ISO both start with a bottoms up process for identifying risks.  That means that many people at various levels in the company get to make input into the risk identification process.  This is the fundamental way that COSO/ISO risk management ends up with risk registers of 200 risks.  COSO and ISO do not, however, offer much if any guidance regarding how to make that into something that can be used by top management and the board.  In RISKVIEWS experience, the 200 item list needs to be sorted into no more than 25 broad categories.  Then those categories need to be considered the Risks of the firm and the list of 200 items considered the Riskettes.  Top management should have a say in the development of that list.  It should be their chooses of names for the 25 Risks. The 25 Risks then need to be divided into three groups.  The top 5 to 7 Risks are the first rank risks that are the focus of discussions with the Board.    Those should be the Risks that are most likely to cause a financial or other major disruption to the firm.   Besides focusing on those first rank risks, the board should make sure that management is attending to all of the 25 risks.  The remaining 18 to 20 Risks then can be divided into two ranks.  The Top management should then focus on the first and second rank risks.  And they should make sure that the risk owners are attending to the third rank risks.  Top management, usually through a risk committee, needs to regularly look at these risk assignments and promote and demote risks as the company’s exposure and the risk environment changes.  Now, if you are a risk manager who has recently spent a year or more constructing the list of the 200 Riskettes, you are doubtless wondering what use would be made of all that hard work.  Under the Hierarchical principle of ERM, the process described above is repeated down the org chart.  The risk committee will appoint a risk owner for each of the 25 Risks and that risk owner will work with their list of Riskettes.  If their Riskette list is longer than 10, they might want to create a priority structure, ranking the risks as is done for the board and top management.  But if the initial risk register was done properly, then the Riskettes will be separate because there is something about them that requires something different in their monitoring or their risk treatment.  So the risk register and Riskettes will be an valuable and actionable way to organize their responsibilities as risk owner.  Even if it is never again shown to the Top management and the board.

These two ideas do not contradict the main thrust of COSO and ISO but they do represent a major adjustment in approach for insurance company risk managers who have been going to COSO or ISO for guidance.  It would be best if those risk managers knew in advance about these two differences from the COSO/ISO approach that is applied in non-financial firms.

Setting your Borel Point

Posted July 28, 2014 by riskviews
Categories: Black Swan, Enterprise Risk Management, Tail Risk

Tags: , ,

What is a Borel Risk Point you ask?  Emile Borel once said

“Events with a sufficiently small probability never occur”.

Your Borel Risk Point (BRP) is your definition of “sufficiently small probability” that causes you to ignore unlikely risks.

Chances are, your BRP is set at much too high of a level of likelihood.  You see, when Borel said that, he was thinking of a 1 in 1 million type of likelihood.  Human nature, that has survival instincts that help us to survive on a day to day basis, would have us ignoring things that are not likely to happen this week.

Even insurance professionals will often want to ignore risks that are as common as 1 in 100 year events.  Treating them as if they will never happen.

And in general, the markets allow us to get away with that.  If a serious adverse event happens, the unprepared generally are excused if it is something as unlikely as a 1 in 100 event.

That works until another factor comes into play.  That other factor is the number of potential 1 in 100 events that we are exposed to.  Because if you are exposed to fifty 1 in 100 events, you are still pretty unlikely to see any particular event, but very likely to see some such event.

Governor Andrew Cuomo of New York State reportedly told President Obama,

New York “has a 100-year flood every two years now.”
Solvency II has Europeans all focused on the 1 in 200 year loss.  RISKVIEWS would suggest that is still too high of a likelihood for a good Borel Risk Point for insurers. RISKVIEWS would argue that insurers need to have a higher BRP because of the business that they are in.  For example, Life Insurers primary product (which is life insurance, at least in some parts of the world) pays for individual risks (unexpected deaths) that occur at an average rate of less than 1 in 1000.  How does an insurance company look their customers in the eye and say that they need to buy protection against a 1 in 1000 event from a company that only has a BRP of 1 in 200?
So RISKVIEWS suggest that insurers have a BRP somewhere just above 1 in 1000.  That might sound aggressive but it is pretty close to the Secure Risk Capital standard.  With a Risk Capital Standard of 1 in 1000, you can also use the COR instead of a model to calculate your capital needed.

Key Ideas of ERM

Posted July 24, 2014 by riskviews
Categories: Chief Risk Officer, Enterprise Risk Management, Risk Culture, Risk Management System

Tags: , ,

For a set of activities to be called ERM, they must satisfy ALL of these Key Ideas…

  1. Transition from Evolved Risk Management to planned ERM
  2. Comprehensive – includes ALL risks
  3. Measurement – on a consistent basis allows ranking and…
  4. Aggregation – adding up the risks to know total
  5. Capital – comparing sum of risks to capital – can apply security standard to judge
  6. Hierarchy – decisions about risks are made at the appropriate level in the organization – which means information must be readily available

Risk management activities that do not satisfy ALL Key Ideas may well be good and useful things that must be done, but they are not, by themselves ERM.

Many activities that seek to be called ERM do not really satisfy ALL Key Ideas.  The most common “fail” is item 2, Comprehensive.  When risks are left out of consideration, that is the same as a measurement of zero.  So no matter how difficult to measure, it is extremely important to really, really be Comprehensive.

But it is quite possible to “fail” on any of the other Key Ideas.

The Transition idea usually “fails” when the longest standing traditional risk management practices are not challenged to come up to ERM standards that are being applied to other risks and risk management activities.

Measurement “fails” when the tails of the risk model are not of the correct “fatness“.  Risks are significantly undervalued.

Aggregation “fails” when too much independence of risks is assumed.  Most often ignored is interdependence caused by common counter parties.

Capital “fails” when the security standard is based upon a very partial risk model and not on a completely comprehensive risk model.

Hierarchy “fails” when top management and/or the board do not personally take responsibility for ERM.  The CRO should not be an independent advocate for risk management, the CRO should be the agent of the power structure of the firm.

In fact Hierarchy Failure is the other most common reason for ERM to fail.

Is it rude to ask “How fat is your tail?”

Posted July 23, 2014 by riskviews
Categories: Enterprise Risk Management, Tail Risk

Tags: ,

In fact, not only is it not rude, the question is central to understanding risk models.  The Coefficient of Riskiness(COR) allows us for the first time to talk about this critical question.

332px-36_Stanley_Hawk

You see, “normal” sized tails have a COR of three. If everything were normal, then risk models wouldn’t be all that important. We could just measure volatility and multiply it by 3 to get the 1 in 1000 result. If you instead want the 1 in 200 result, you would multiply the 1 in 1000 result by 83%.

Amazing maths fact – 3 is always the answer.

But everything is not normal. Everything does not have a COR of 3. So how fat are your tails?

RISKVIEWS looked at an equity index model. That model was carefully calibrated to match up with very long term index returns (using Robert Shiller’s database). The fat tailed result there has a COR of 3.5. With that model the 2008 S&P 500 total return loss of 37% is a 1 in 100 loss.

So if we take that COR of 3.5 and apply it to the experience of 1971 to 2013 that happens to be handy, the mean return is 12% and the volatility is about 18%. Using the simple COR approach, we estimate the 1 in 1000 loss as 50% (3.5 times the volatility subtracted from the average). To get the 1/200 loss, we can take 83% of that and we get a 42% loss.

RISKVIEWS suggests that the COR can be an important part of Model Validation.

 Looking at the results above for the stock index model, the question becomes why is 3.5 then the correct COR for the index? We know that in 2008, the stock market actually dropped 50% from high point to low point within a 12 month period that was not a calendar year. If we go back to Shiller’s database, which actually tracks the index values monthly (with extensions estimated for 50 years before the actual index was first defined), we find that there are approximately 1500 12 month periods. RISKVIEWS recognizes that these are not independent observations, but to answer this particular question, these actually are the right data points. And looking at that data, a 50% drop in a 12 month period is around the 1000th worst 12 month period. So a model with a 3.5 COR is pretty close to an exact fit with the historical record. And what if you have an opinion about the future riskiness of the stock market? You can vary the volatility assumptions if you think that the current market with high speed trading and globally instantaneously interlinked markets will be more volatile than the past 130 years that Schiller’s data covers. You can also adjust the future mean. You might at least want to replace the historic geometric mean of 10.6% for the arithmetic mean quoted above of 12% since we are not really taking about holding stocks for just one year. And you can have an opinion about the Riskiness of stocks in the future. A COR of 3.5 means that the tail at the 1 in 1000 point is 3.5 / 3 or 116.6% of the normal tails. That is hardly an obese tail.

The equity index model that we started with here has a 1 in 100 loss value of 37%. That was the 2008 calendar total return for the S&P 500. If we want to know what we would get with tails that are twice as fat, with the concept of COR, we can look at a COR of 4.0 instead of 3.5. That would put the 1 in 1000 loss at 9% worse or 59%. That would make the 1 in 200 loss 7% worse or 49%.

Those answers are not exact. But they are reasonable estimates that could be used in a validation process.

Non-technical management can look at the COR for each model can participate in a discussion of the reasonability of the fat in the tails for each and every risk.

RISKVIEWS believes that the COR can provide a basis for that discussion. It can be like the Richter scale for earthquakes or the Saffir-Simpson scale for hurricanes. Even though people in general do not know the science underlying either scale, they do believe that they understand what the scale means in terms of severity of experience. With exposure, the COR can take that place for risk models.

Chicken Little or Coefficient of Riskiness (COR)

Posted July 21, 2014 by riskviews
Categories: Enterprise Risk Management, risk assessment, Tail Risk

Tags: ,

Running around waving your arms and screaming “the Sky is Falling” is one way to communicate risk positions.  But as the story goes, it is not a particularly effective approach.  The classic story lays the blame on the lack of perspective on the part of Chicken Little.  But the way that the story is told suggests that in general people have almost zero tolerance for information about risk – they only want to hear from Chicken Little about certainties.

But insurers live in the world of risk.  Each insurer has their own complex stew of risks.  Their riskiness is a matter of extreme concern.  Many insurers use complex models to assess their riskiness.  But in some cases, there is a war for the hearts and minds of the decision makers in the insurer.  It is a war between the traditional qualitative gut view of riskiness and the new quantitative view of riskiness.  One tactic in that war used by the qualitative camp is to paint the quantitative camp as Chicken Little.

In a recent post, Riskviews told of a scale, a Coefficient of Riskiness.  The idea of the COR is to provide a simple basis for taking the argument about riskiness from the name calling stage to an actual discussion about Riskiness.

For each risk, we usually have some observations.  And from those observations, we can form the two basic statistical facts, the observed average and observed volatility (known as standard deviation to the quants).  But in the past 15 years, the discussion about risk has shifted away from the observable aspects of risk to an estimate of the amount of capital needed for each risk.

Now, if each risk held by an insurer could be subdivided into a large number of small risks that are similar in riskiness for each (including size of potential loss) and where the reasons for the losses for each individual risk were statistically separate (independent) then the maximum likely loss to be expected (99.9%tile) would be something like the average loss plus three times the volatility.  It does not matter what number is the average or what number is the standard deviation.

RISKVIEWS has suggested that this multiple of 3 would represent a standard amount of riskiness and become the index value for the Coefficient of Riskiness.

This could also be a starting point in looking at the amount of capital needed for any risks.  Three times the observed volatility plus the observed average loss.  (For the quants, this assumes that losses are positive values and gains negative.  If you want losses to be negative values, then take the observed average loss and subtract three times the volatility).

So in the debate about risk capital, that value is the starting point, the minimum to be expected.  So if a risk is viewed as made up of substantially similar but totally separate smaller risks (homogeneous and independent), then we start with a maximum likely loss of average plus three times volatility.  Many insurers choose (or have chosen for them) to hold capital for a loss at the 1 in 200 level.  That means holding capital for 83% of this Maximum Likely Loss.  This is the Viable capital level.  Some insurers who wish to be at the Robust level of capital will hold capital roughly 10% higher than the Maximum Likely Loss.  Insurers targeting the Secure capital level will hold capital at approximately 100% of the Maximum Likely Loss level.

But that is not the end of the discussion of capital.  Many of the portfolios of risks held by an insurer are not so well behaved.  Those portfolios are not similar and separate.  They are dissimilar in the likelihood of loss for individual exposures, they are dissimilar for the possible amount of loss.  One way of looking at those dissimilarities is that the variability of rate and of size result in a larger number of pooled risks acting statistically more like a smaller number of similar risks.

So if we can imagine that evaluation of riskiness can be transformed into a problem of translating a block of somewhat dissimilar, somewhat interdependent risks into a pool of similar, independent risks, this riskiness question comes clearly into focus.  Now we can use a binomial distribution to look at riskiness.  The plot below takes up one such analysis for a risk with an average incidence of 1 in 1000.  You see that for up to 1000 of these risks, the COR is 5 or higher.  The COR gets up to 6 for a pool of only 100 risks.  It gets close to 9 for a pool of only 50 risks.

 

cor

 

There is a different story for a risk with average incidence of 1 in 100.  COR is less than 6 for a pool as small as 25 exposures and the COR gets down to as low as 3.5.

Cor100

In producing these graphs, RISKVIEW notices that COR is largely a function of number of expected claims.  So The following graph shows COR plotted against number of expected claims for low expected number of claims.  (High expected claims produces COR that is very close to 3 so are not very interesting.)

COR4You see that the COR stays below 4.5 for expected claims 1 or greater.  And there does seem to be a gently sloping trend connecting the number of expected claims and the COR.

So for risks where losses are expected every year, the maximum COR seems to be under 4.5.  When we look at risks where the losses are expected less frequently, the COR can get much higher.  Values of COR above 5 start showing up with expected losses that are in the range of .2 and values above .1 are even higher.

cor5

What sorts of things fit with this frequency?  Major hurricanes in a particular zone, earthquakes, major credit losses all have expected frequencies of one every several years.

So what has this told us?  It has told us that fat tails can come from the small portfolio effect.  For a large portfolio of similar and separate risks, the tails are highly likely to be normal with a COR of 3.  For risks with a small number of exposures, the COR, and therefore the tail, might get as much as 50% fatter with a COR of up to 4.5. And the COR goes up as the number of expected losses goes down.

Risks with very fat tails are those with expected losses less frequent than one per year can have much fatter tails, up to three times as fat as normal.

So when faced with those infrequent risks, the Chicken Little approach is perhaps a reasonable approximation of the riskiness, if not a good indicator of the likelihood of an actual impending loss.

 

Quantitative vs. Qualitative Risk Assessment

Posted July 14, 2014 by riskviews
Categories: Enterprise Risk Management, Modeling, risk assessment, Statistics, Tail Risk, Volatility

Tags: ,

There are two ways to assess risk.  Quantitative and Qualitative.  But when those two words are used in the NAIC ORSA Guidance Manual, their meaning is a little tricky.

In general, one might think that a quantitative assessment uses numbers and a qualitative assessment does not.  The difference is as simple as that.  The result of a quantitative assessment would be a number such as $53 million.  The result of a qualitative assessment would be words, such as “very risky” or “moderately risky”.

But that straightforward approach to the meaning of those words does not really fit with how they are used by the NAIC.  The ORSA Guidance Manual suggests that an insurer needs to include those qualitative risk assessments in its determination of capital adequacy.  Well, that just will not work if you have four risks that total $400 million and three others that are two “very riskys” and one “not so risk”.  How much capital is enough for two “very riskys”, perhaps you need a qualitative amount of surplus to provide for that, something like “a good amount”.

RISKVIEWS believes that then the NAIC says “Quantitative” and “Qualitative” they mean to describe two approaches to developing a quantity.  For ease, we will call these two approaches Q1 and Q2.

The Q1 approach is data and analysis driven approach to developing the quantity of loss that the company’s capital standard provides for.  It is interesting to RISKVIEWS that very few participants or observers of this risk quantification regularly recognize that this process has a major step that is much less quantitative and scientific than others.

The Q1 approach starts and ends with numbers and has mathematical steps in between.  But the most significant step in the process is largely judgmental.  So at its heart, the “quantitative” approach is “qualitative”.  That step is the choice of mathematical model that is used to extrapolate and interpolate between actual data points.  In some cases, there are enough data points that the choice of model can be based upon somewhat less subjective fit criteria.  But in other cases, that level of data is reached by shortening the time step for observations and THEN making heroic (and totally subjective) assumptions about the relationship between successive time periods.

These subjective decisions are all made to enable the modelers to make a connection between the middle of the distribution, where there usually is enough data to reliably model outcomes and the tail, particularly the adverse tail of the distribution where the risk calculations actually take place and where there is rarely if ever any data.

There are only a couple of subjective decisions possibilities, in broad terms…

  • Benign – Adverse outcomes are about as likely as average outcomes and are only moderately more severe.
  • Moderate – Outcomes similar to the average are much more likely than outcomes significantly different from average.  Outcomes significantly higher than average are possible, but likelihood of extremely adverse outcomes are extremely highly unlikely.
  • Highly risky – Small and moderately adverse outcomes are highly likely while extremely adverse outcomes are possible, but fairly unlikely.

The first category of assumption, Benign,  is appropriate for large aggregations of small loss events where contagion is impossible.  Phenomenon that fall into this category are usually not the concern for risk analysis.  These phenomenon are never subject to any contagion.

The second category, Moderate, is appropriate for moderate sized aggregations of large loss events.  Within this class, there are two possibilities:  Low or no contagion and moderate to high contagion.  The math is much simpler if no contagion is assumed.

But unfortunately, for risks that include any significant amount of human choice, contagion has been observed.  And this contagion has been variable and unpredictable.  Even more unfortunately, the contagion has a major impact on risks at both ends of the spectrum.  When past history suggests a favorable trend, human contagion has a strong tendency to over play that trend.  This process is called “bubbles”.  When past history suggests an unfavorable trend, human contagion also over plays the trend and markets for risks crash.

The modelers who wanted to use the zero contagion models, call this “Fat Tails”.  It is seen to be an unusual model, only because it was so common to use the zero contagion model with the simpler maths.

RISKVIEWS suggests that when communicating that the  approach to modeling is to use the Moderate model, the degree of contagion assumed should be specified and an assumption of zero contagion should be accompanied with a disclaimer that past experience has proven this assumption to be highly inaccurate when applied to situations that include humans and therefore seriously understates potential risk.

The Highly Risky models are appropriate for risks where large losses are possible but highly infrequent.  This applies to insurance losses due to major earthquakes, for example.  And with a little reflection, you will notice that this is nothing more than a Benign risk with occasional high contagion.  The complex models that are used to forecast the distribution of potential losses for these risks, the natural catastrophe models go through one step to predict possible extreme events and the second step to calculate an event specific degree of contagion for an insurer’s specific set of coverages.

So it just happens that in a Moderate model, the 1 in 1000 year loss is about 3 standard deviations worse than the mean.  So if we use that 1 in 1000 year loss as a multiple of standard deviations, we can easily talk about a simple scale for riskiness of a model:

Scale

So in the end the choice is to insert an opinion about the steepness of the ramp up between the mean and an extreme loss in terms of multiples of the standard deviation.  Where standard deviation is a measure of the average spread of the observed data.  This is a discussion that on these terms include all of top management and the conclusions can be reviewed and approved by the board with the use of this simple scale.  There will need to be an educational step, which can be largely in terms of placing existing models on the scale.  People are quite used to working with a Richter Scale for earthquakes.  This is nothing more than a similar scale for risks.  But in addition to being descriptive and understandable, once agreed, it can be directly tied to models, so that the models are REALLY working from broadly agreed upon assumptions.

*                  *                *               *             *                *

So now we go the “Qualitative” determination of the risk value.  Looking at the above discussion, RISKVIEWS would suggest that we are generally talking about situations where we for some reason do not think that we know enough to actually know the standard deviation.  Perhaps this is a phenomenon that has never happened, so that the past standard deviation is zero.  So we cannot use the multiple of standard deviation method discussed above.  Or to put is another way, we can use the above method, but we have to use judgment to estimate the standard deviation.

*                  *                *               *             *                *

So in the end, with a Q1 “quantitative” approach, we have a historical standard deviation and we use judgment to decide how risky things are in the extreme compared to that value.  In the Q2 “qualitative” approach, we do not have a reliable historical standard deviation and we need to use judgment to decide how risky things are in the extreme.

Not as much difference as one might have guessed!

ORSA ==> AC – ST > RCS

Posted June 30, 2014 by riskviews
Categories: Economic Capital, Enterprise Risk Management, ORSA, Stress Test

Tags: ,

The Own Risk and Solvency Assessment (or Forward Looking Assessment of Own Risks based on ORSA principles) initially seems daunting.  But the simple formula in the title of this post provides a guide to what is really going on.

  1. To preform an ORSA, an insurer must first decide upon its own Risk Capital Standard.
  2. The insurer needs to develop the capacity to project the financial and risk exposure statistics forward for several years under a range of specified conditions.
  3. Included in the projection capacity is the ability to determine (a) the amount of capital required under their own risk capital standard and (b) the projected amount of capital available.
  4. The insurer needs to select a range of Stress Tests that will be used for the projections.
  5. If, under a projection based upon a Stress Test, the available capital exceeds the Risk Capital Standard, then that Stress Test is a pass.                   AC – ST >RCS
  6. If, under a projection based upon a Stress Test, the available capital is less than the Risk Capital Standard, then that Stress Test is a fail and requires an explanation of intended management actions.                            AC – ST < RCS  ==> MA

RISKVIEWS suggests that Stress Tests should be chosen so that the company can demonstrate that they can pass (AC – ST >RCS) the tests under a wide range of scenarios AND in addition, that one or several of the Stress Tests are severe enough to produce a fail (AC – ST < RCS  ==> MA) condition so that they can demonstrate that management has conceptualized the actions that would be needed in extreme loss situations.

RISKVIEWS also guesses that an insurer that picks a low Risk Capital Standard and Normal Volatility Stress Tests will get push back from the regulators reviewing the ORSA.

RISKVIEWS also guesses that an insurer that picks a high Risk Capital Standard will fail some or all of the more severe Stress Tests.

Furthermore, RISKVIEWS predicts that many insurers will fail the real Future Worst Case Stress Tests.  Only firms that hold themselves to a Robust Risk Capital Standard are likely to have sufficient capital to potentially maintain solvency.  In RISKVIEWS opinion, these Future Worst Case Stress Tests are useful mainly as the starting point for a Reverse Stress Test process.  In financial markets, we have experienced a real life worst case stress with the 2008 Financial Crisis and the following events.  Imaging insurance worst case scenarios that are as adverse as those events seems useful to promoting insurer survival.  Imagining events that are much worse than those – which is what is meant by the Future Worst Case Scenario idea – seems to be overkill.  But, in fact,  the history of adverse events in the recent past seems to indicate that each new major loss is at least twice the previous record.

A Reverse Stress Test is a process under which an insurer would determine the adverse scenario that drives the insurer to insolvency.  Under the NAIC ORSA, Reverse Stress Tests are required, but it is not specified whether those tests should be based upon a condition of failing to meet the insurer’s own Risk Capital Standard or the regulators solvency standard.  RISKVIEWS would recommend both types of tests be performed.

This discussion is the heart of the ORSA.  The full ORSA requires many other elements.  See the recent post INSTRUCTIONS FOR A 17 STEP ORSA PROCESS for the full discussion.


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